Company lists · Data refreshed September 2026

Top 25 Data privacy law firms based in the United States

RevenueBase identified 464 data privacy law firms headquartered in the United States as of September 2026 and tracks 4,268 professional contacts across them, including 2,252 with verified work emails and 1,941 with mobile numbers. New York is the largest hub.

This list covers data privacy law firms headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 1, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase Smart Search rating on every row Refreshed Sep 1, 2026 86% judged on-target in blind review
464Companies
4,268Contacts tracked
2,252Verified emails
1,941Mobile numbers
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The 25 largest data privacy law firms based in the United States

Ranked by team size
Top 25 of 464 data privacy law firms based in the United States, ranked by team size, largest first. Data refreshed Sep 1, 2026. RevenueBase Smart Search rates how each company's information relates to data privacy law firms: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Partial evidenceChicago, IL, United States201-500369 contacts →

Partial evidence

“HaystackID solves complex data challenges related to legal, compliance, regulatory, and cyber events.”

Source: RevenueBase Database · checked Sep 1, 2026
2Strong evidenceWalnut Creek, CA, United States201-500360 contacts →

Strong evidence

Data privacy regulations change daily, with new laws introduced worldwide.”

Source: RevenueBase Database · checked Sep 1, 2026
3Indirect evidenceDevon, PA, United States201-500213 contacts →

Indirect evidence

“Founded by John F.”

Source: RevenueBase Database · checked Sep 1, 2026
4Partial evidenceDenver, CO, United States51-200137 contacts →

Partial evidence

“With offices in Washington, DC, Denver, Colorado, and Austin, Texas, Wilkinson Barker Knauer (WBK) is the nation’s largest stand-alone communications and technology law firm.”

Source: RevenueBase Database · checked Sep 1, 2026
5Indirect evidenceHouston, TX, United States51-200134 contacts →

Indirect evidence

“Litigation, compliance and investigations: It's what we do, day in and day out.”

Source: RevenueBase Database · checked Sep 1, 2026
6Partial evidenceSt Petersburg, FL, United States51-200130 contacts →

Partial evidence

“360 Advanced is a relationship-focused cybersecurity and compliance firm offering security, privacy and compliance-oriented solutions customized to meet your organization and your…”

Source: RevenueBase Database · checked Sep 1, 2026
7Strong evidenceChantilly, VA, United States51-200111 contacts →

Strong evidence

“Redgrave is the leading law firm addressing legal discovery, information governance, AI governance, data security, and other Information Law challenges for corporations and…”

Source: RevenueBase Database · checked Sep 1, 2026
8Partial evidenceHanover, MD, United States51-20078 contacts →

Partial evidence

“Established in 1997, Hudson Cook, LLP focuses on state and federal consumer and commercial financial services, banking and privacy compliance, regulation, enforcement and…”

Source: RevenueBase Database · checked Sep 1, 2026
9Strong evidenceWashington, DC, United States51-20072 contacts →

Strong evidence

“ZwillGen is a boutique law firm specializing in technology and privacy law.”

Source: RevenueBase Database · checked Sep 1, 2026
10Partial evidenceTampa, FL, United States201-50068 contacts →

Partial evidence

“Focal Point Data Risk is now a CDW company!”

Source: RevenueBase Database · checked Sep 1, 2026
11Partial evidenceDuluth, GA, United States51-20052 contacts →

Partial evidence

“CompliancePoint delivers the governance, protections and assurances organizations need to succeed in an interconnected and data-driven world.”

Source: RevenueBase Database · checked Sep 1, 2026
12Strong evidenceNew York, NY, United States11-5046 contacts →

Strong evidence

“Founded in 2008, with operations in New York, London and Toronto, Bortstein Legal Group is a noted leader in the areas of technology, market data, digital content, privacy…”

Source: RevenueBase Database · checked Sep 1, 2026
13Partial evidencePortland, ME, United States51-20039 contacts →

Partial evidence

“Deer Brook Consulting is your trusted partner in information security, privacy, and technology.”

Source: RevenueBase Database · checked Sep 1, 2026
14Partial evidencePhiladelphia, PA, United States11-5038 contacts →

Partial evidence

“A dynamic, modern law firm meeting the legal services needs of the business community.”

Source: RevenueBase Database · checked Sep 1, 2026
15Strong evidenceWilmington, DE, United States11-5033 contacts →

Strong evidence

“Clarip is a data privacy platform that helps brands engage consumers in a new way and manage data privacy across IoT devices, Apps, and Websites, in addition to traditional sales…”

Source: RevenueBase Database · checked Sep 1, 2026
16Indirect evidenceWashington Dc, DC, United States11-5029 contacts →

Indirect evidence

“Lerman Senter PLLC provides legal advisory services.”

Source: RevenueBase Database · checked Sep 1, 2026
17Partial evidenceNew York City, NY, United States51-20029 contacts →

Partial evidence

“Sourcepoint is the practical privacy software company trusted by the world's most influential brands.”

Source: RevenueBase Database · checked Sep 1, 2026
18Strong evidenceIrvine, CA, United States11-5027 contacts →

Strong evidence

“Troutman Amin, LLP is a nationally-recognized complex litigation and privacy consulting law firm based in Irvine, CA.”

Source: RevenueBase Database · checked Sep 1, 2026
19Partial evidenceNew Albany, OH, United States11-5025 contacts →

Partial evidence

“Mac Murray & Shuster (M&S) is a nationally recognized women-owned boutique firm with a dedicated focus on consumer protection and privacy regulatory compliance and litigation.”

Source: RevenueBase Database · checked Sep 1, 2026
20Indirect evidenceOradell, NJ, United States51-20025 contacts →

Indirect evidence

“Security Validation is your trusted advisor.”

Source: RevenueBase Database · checked Sep 1, 2026
21Indirect evidenceFort Lauderdale, FL, United States11-5025 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 1, 2026
22Strong evidenceSeattle, WA, United States11-5024 contacts →

Strong evidence

“Hintze Law PLLC exclusively provides global data protection counseling for technology, ecommerce, advertising, media, and mobile companies, organizations, and industry…”

Source: RevenueBase Database · checked Sep 1, 2026
23Partial evidenceRichmond, VA, United States51-20024 contacts →

Partial evidence

“BD Emerson: Transforming Security, Privacy, Compliance & Technology into Competitive Advantages BD Emerson stands at the forefront of cybersecurity and information security…”

Source: RevenueBase Database · checked Sep 1, 2026
24Indirect evidenceChicago, IL, United States11-5023 contacts →

Indirect evidence

“A class action litigation firm”

Source: RevenueBase Database · checked Sep 1, 2026
25Indirect evidenceRoswell, GA, United States51-20023 contacts →

Indirect evidence

“CyXcel is a digital risk advisory firm built for a new era.”

Source: RevenueBase Database · checked Sep 1, 2026

Showing 25 of 464 data privacy law firms based in the United States

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Data privacy law firms based in the United States at a glance

As of Sep 1, 2026
52.8%Verified-email coverage
45.5%Mobile-number coverage
9.2Average contacts per company
1-10Median size (employees)
6.9%Largest-city concentration · New York
Sep 1, 2026Page data refreshed

Companies by employee count

1-10
341
11-50
93
51-200
20
201-500
6
501-1,000
2

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among data privacy law firms, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies
Companies headquartered in the United States whose own description of what they do matches “data privacy law firms”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search
RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names data privacy law firms), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude
Companies whose own description does not clearly place them among data privacy law firms, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
Match quality
In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking
Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification
Every listed company carries at least one verified work email, 2,252 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh
This page's figures were pulled from the company graph on September 1, 2026. Lists refresh periodically as the graph is re-checked.
Corrections
Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names data privacy law firms, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many data privacy law firms are there based in the United States?

RevenueBase identified 464 data privacy law firms headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Haystackid, headquartered in Chicago, tops this list with the largest team on record.

Which city has the most data privacy law firms?

New York leads with 32 headquartered companies, followed by Washington (30) and San Francisco (19).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 2,252 verified decision-maker contacts tracked across these 464 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 1, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.